library test /*isNonNullableByDefault*/;
import self as self;
import "dart:core" as core;

typedef F<contravariant T extends core::Object? = dynamic> = (T%) → void;
class B<T extends core::Object? = dynamic, U extends (self::B::T%) → void = (Never) → void> extends core::Object {
  synthetic constructor •() → self::B<self::B::T%, self::B::U>
    ;
  operator +(dynamic other) → self::B<self::B::T%, (self::B::T%) → void>
    ;
}
class C extends core::Object {
  field self::B<core::num, (core::num) → void> x;
  static field self::B<core::num, (core::num) → void> y;
  synthetic constructor •() → self::C
    ;
  operator [](core::int i) → self::B<core::num, (core::num) → void>
    ;
  operator []=(core::int i, self::B<core::num, (core::num) → void> v) → void
    ;
}
static method test1(self::B<core::num, (core::num) → void> b) → void
  ;
static method test2(self::C c) → void
  ;
static method test3(self::C c) → void
  ;
static method test4(self::C c) → void
  ;
static method main() → void
  ;